Holley carburetor

[mmillstx]

Guys,

Anyone know what size jets they are running in a Holley 4bbl? I just got mine back from a complete rebuild and it is running too rich. I am going to remove the bowl later today and take the jets down in size, anyway. Just curious.

 

[68gt390]

What size engine are you running? My car is really loading up on the right side. I'm thinking of doing the same thing. I'm running a 390 with a 600 cfm Holley. That's what they came with from the factory but, I've got a knew carb so, I think it needs to have smaller jets.
I've adjusted the floats - doesn't really help. Next move is to put in smaller jets.

Don :'(

 

[Russ]

My "J" Code has a 600 cfm Holley (not the original carburetor) and it is jetted with 60's on the primary side and 64's on the secondary side. I live in Flagstaff, AZ , at 7000 ft elevation, and the car runs very strong with no black smoke. I have the same jets in my Shelby GT 350 that has a dual feed Holley. Hope this helps, Russ

 

[mmillstx]

Russ,

Thanks for the info. I knew that someone in the community would know. I just pulled the primary and it has 66's in it. I think that I will take them down to 60's and see what happens. I will kepp you guys updated.